Multiple Choice
Star A has an absolute magnitude of 2.5 and star B has an apparent magnitude of 2.5, but star A is a main sequence star and star B is a red giant. Which statement below is correct?
A) Star A appears brighter than star B, but star B and star A have the same intrinsic brightness.
B) Star B appears brighter than star A, but star B and star A have the same intrinsic brightness.
C) Star A and star B appear to have the same brightness, but star B is intrinsically brighter than star A.
D) Star A and star B appear to have the same brightness, but star A is intrinsically brighter than star B.
E) It is impossible to determine how bright these stars are or appear to be relative to one another, given the information above.
Correct Answer:

Verified
Correct Answer:
Verified
Q6: Why are spectra of stars different?
Q7: Star A is a main sequence star
Q7: Having nothing to do with trigonometry, _
Q30: Capella is the same temperature as our
Q47: What is proper motion? How is it
Q54: What types of observations are necessary to
Q56: A star with a parallax of 1
Q83: In a spectroscopic binary system, the star
Q86: In comparing first magnitude Deneb with second
Q102: On the H-R diagram,white dwarfs lie Sirius